20.46% is the change from 391 to 471
Calculation steps:
[( 471 - 391 ) ÷ 391] x 100 = 20.46%
Formula
Percentage change = [(471 - 391) / 391] x 100
Subtract the new number by the original number
471 - 391 = 80
80 ÷ 391 = 0.20460358056265984
0.20460358056265984 x 100 = 20.46%